SICK ET3-P5728 Photoelectric Sensor With M12 Connection

The Sick ET3-P5728 is a compact ELF3 diffuse photoelectric sensor that detects object presence across a 5 mm to 155 mm range using an 880 nm infrared emitter and focused optics. It runs on 10–30 V DC and draws about 20 mA, with a PNP switching output suitable for PLC or microcontroller interfaces. Housed in a small 23.8 × 43.4 × 33.6 mm body with an M18 thread, the sensor is designed for tight-space mounting on conveyors and in automation cells, delivering stable direct-sensing performance with a 1:1 light/dark response and robust output switching characteristics. Its direct sensing capabilities and compact form factor make it a practical choice for part-detection applications where quick installation and reliable detection at short to moderate ranges are important.